Only the gospel of Christ fully knows the mystery of sin and the problem of sin and everything which hides within it. The prodigal son of the Gospel is the perfect example of the repentant sinner. The Gospel shows us that man, through his free will, can share his life with Earth and with Heaven, with Satan and with God, with paradise and with hell. Sin gradually strips man of everything divine in him, paralyzes his every divine inclination and desire, until it finally throws him into the bosom of Satan. And then man reaches the plight of grazing the swine of his master, the Devil. The swine are passions, which are always greedy and gluttonous. In such a life, the unfortunate man is nothing more than insane. In a shocking parable of the Gospel, the Lord says about the prodigal son, ‘he came to himself,’ (Luke 15:17) How did he come to himself? He came to himself through repentance. Through sin, man becomes mad, insane. Every sin, even the most seemingly insignificant one, is always an insanity of the soul. Through repentance, man comes to his senses becomes complete again, comes to himself. Then he cries out loud to God, runs to Him, and cries towards Heaven, ‘Father, I have sinned against Heaven, and in thy sight’ (Luke 15:21). And what is the heavenly Father doing? He is always infinitely merciful upon seeing His child in a state of repentance. He has compassion for him, runs, embraces him, and kisses him. He orders His heavenly hosts, the holy angels: ‘Bring forth the best robe and put it on him; and put a ring on his hand, and shoes on his feet: and bring hither the fatted calf, and kill it; and let us eat, and be merry: for this is My son who was dead, and is alive again; and he was lost, and is found. And they began to be merry.’ (Luke 16:22-24) And this is taking place for each and every one of us, and for the sake of every sinner who repents. Namely, joy and happiness is taking place in the heaven of the All-merciful Lord and God, and together with Him, all of the holy angels.

St. Justin Martyr

What is the aim of the incarnate dispensation of God’s Word, preached in all the Holy Scriptures but which we, who read them, do not know? The only aim is that, having entered into what is our own, we should participate in what is His. The Son of God has become Son of Man in order to make us, men, sons of God, raising our race by grace to what He is Himself by nature, granting us birth from above through the grace of the Holy Spirit and leading us straightway to the kingdom of heaven, or rather, granting us this kingdom of heaven within us (Luke 17:21), in order that we should not merely be fed by the hope of entering it, but entering into full possession thereof should cry: our ‘life is hid with Christ in God’ (Col. 3:3).

St. Symeon the New Theologian

Three old men once came to Abba Sisoes [St. Sisoes the Great] because they had heard that he was a great man. And the first one said unto him, "Father, how can I escape from the river of fire?" And Abba Sisoes answered him never a word. Then the second old man said to him, "Father, how can I escape from the gnashing of teeth, and from the worm which never dies?" And Abba Sisoes answered him never a word. Then the third old man said to him, "Father, what will I do? For the remembrance of the outer darkness troubles me." And Abba Sisoes answered and said to them, "I never think on any of these things, but I believe that God is Merciful, and that He will show mercy to me"; then the old men went away grieved at the answer which Abba Sisoes had spoken to them. Now because he did not wish to send them away sorrowful, he brought them back, and said to them, "Blessed are ye, O my brothers, for I have been jealous of you"; and they said to him, "In what matter have you been jealous of us?" And he said, "The first one of you spake about a river of fire; and the second spake about the gnashing of teeth and the worm which dies not; and the third spake about the outer darkness; if remembrances of this kind have dominion over your minds it is impossible for you to commit sin. What can I do who am stubborn of heart? For hardness of heart will not allow me to perceive even that there a punishment for men existeth, and because of this I sin every hour." And when the old men had heard these words, they made excuses to him, and said, "In very truth according to what we have heard, even so have we seen."

from Sayings of the Holy Desert Fathers

You came into the world to save sinners; therefore You came to save Me also? You came to find and to save him who was lost; therefore You came to seek me too, for I am one of the lost. O Lord, O my God and Creator! I should have come to You as a transgressor of Your law. I should have fallen at Your feet, cast myself down before You, humbly begging forgiveness, pleading with You and craving Your mercy. But You Yourself have come to me, wretched and good-for-nothing servant that I am; my Lord has come to me, His enemy and apostate; my Master has come and has bestowed his love of mankind upon me. Listen my soul: God has come to us.

St. Tikhon of Zadonsk

Where are You pasturing Your flock, O Good Shepherd, who carry the whole flock on Your shoulders? For the whole of human nature is one sheep, and You have lifted it upon Your shoulders. 

Show me the place of peace, lead me to the good pasture that will nourish me, call me by name so that I, Your sheep, may hear Your voice, and by Your speech give me eternal life. Answer me, You whom my soul loves. 

I give You the name “You whom my soul loves” because Your name is above every name and above all understanding, and there is no rational nature that can utter it or comprehend it. Therefore Your name, by which Your goodness is known, is simply the love my soul has for You. How could I not love You, when You loved me so much, even though my heart was black, that You laid down Your life for the sheep of Your flock? A greater love cannot be imagined than exchanging Your life for my salvation. 

Show me then (says my soul) where You pasture Your flock, so that I can find that saving pasture too, and fill myself with the food of heaven without which no one can come to eternal life, and run to the spring and fill myself with the drink of God. You give it, as from a spring, to those who thirst—water pouring from Your side cut open by the lance, water that, to whoever drinks it, is a fountain of water springing up to eternal life. 

If You lead me to pasture here, You will make me lie down at noon, sleeping at peace and taking my rest in light unstained by any shade. For the noon has no shade and the sun stands far above the mountain peaks. You bring Your flock to lie in this light when You bring Your children to rest with You in Your bed. But no one can be judged worthy of this noonday rest who is not a child of light and a child of the day. Whoever has separated himself equally from the shadows of evening and morning, from where evil begins and evil ends, at noon he will lie down and the sun of righteousness will shine on him. 

Show me, then (says my soul), how I should sleep and how I should graze, and where the path is to my noonday rest. Do not let me fall away from Your flock because of ignorance and find myself one of a flock of sheep that are not Yours. 

Thus spoke my soul, when she was anxious about the beauty that God’s care had given her and wanted to know how she could keep this good fortune forever.

St. Gregory of Nyssa

If you find that there is no love in you, but you want to have it, then do deeds of love, even though you do them without love in the beginning. The Lord will see you desire and striving and will put love in your heart.

St. Ambrose of Optina

If you do good, you must do it only for God. For this reason you must pay no attention to the ingratitude of people. Expect a reward not here, but from the Lord in heaven. If you expect it here — it will be in vain and you will endure deprivation.

St. Ambrose of Optina

A man whose intellect has been formed by the knowledge that comes by dint of the virtues through the divine Spirit is said to experience divine things; for he has acquired such knowledge not by nature, thanks simply to his existence, but by grace, thanks to his participation in it.  When a man has not received knowledge by grace, even though he calls a particular thing spiritual, he does not know its true character from experience.  For mere learning does not produce a state of spiritual knowledge.

St. Maximus the Confessor

When struggles are replaced by consolations, and vice versa, they engender faith in God and indifference to the world.  Faith, having taken man by the hand, places him before God.

St. Ignatius Brianchaninov

If we want, Christian, to have our heart filled with divine love we must first empty it of the love of this world, its frivolous and sinful customs and then turn our hearts to the one God, our only good and happiness and eternal beatitude.

St Tikhon of Zadonsk

When God revealed himself, he united himself with our mortal nature in order to deify humanity through this close relation with deity. Since this is so, through his flesh, constituted by bread and wine, he implants himself in all believers.

St. Gregory of Nyssa

The grace of the Holy Spirit which is given mystically to every Christian when he is baptized acts and is manifested in proportion to our obedience to the commandments of the Lord. That is, if a Christian obeys the commandments of the Lord more, grace acts with him more, while if he obeys them less, grace acts within him less. Just as a spark, when covered in the ashes of fire becomes increasingly manifest as one removes the ashes, and the more fire wood you put the more the fire burns, so the grace that has been given to every Christian through Holy Baptism is hidden in the heart and covered up by the passions and sins, and the more a man acts in accordance with the commandments of Christ, the more he is cleansed of the passions and the more the fire of Divine grace lights in his heart, illumines and deifies him.

St. Nicodemus of the Holy Mountain

Glory be to Him, Who never felt the need of our praising Him; yet felt the need as being kind to us, and thirsted as loving us, and asks us to give to Him, and longs to give to us. His fruit was mingled with us men, that in Him we might come near to Him, Who condescended to us. By the Fruit of His stem He grafted us into His Tree.

St. Ephraim of Syria

Do not think that you have a right to complain when your prayers are not answered. God fulfils your desires in a manner that you do not know.

St. Nectarios of Aegina

Miracles are not impossible from a logical standpoint, and right reason does not deny them. Natural laws do not have the claim to be the only ones, nor are they threatened with being overturned by the appearance of other laws, supernatural ones, which also are conducive to the development and furtherance of creation… Miracles are a consequence of the Creator’s love for his creatures.

St. Nectarios of Aegina

If you have not yet received the gift of self-control, know that the Lord is ready to hear you if you entreat Him with prayer and hope.

St. John of Karpathos